Reusable waterborne polyurethane shielding material and preparation method thereof

A technology for water-based polyurethane and masking materials, applied in the field of polyurethane materials, can solve the problems of non-reusable, difficult to handle, not environmentally friendly, etc., and achieve the effects of easy tearing, saving production materials, and reducing waste

Pending Publication Date: 2021-01-22
长春一汽富维东阳汽车塑料零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a reusable water-based polyurethane masking material to solve the technical problems that existing masking materials tend to have residual glue on the product surface, are difficult to handle, cannot be reused, and are not environmentally friendly.

Method used

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  • Reusable waterborne polyurethane shielding material and preparation method thereof
  • Reusable waterborne polyurethane shielding material and preparation method thereof
  • Reusable waterborne polyurethane shielding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A reusable water-based polyurethane masking material comprises the following raw materials:

[0026]

[0027] Described plasticizer is dibutyltin dilaurate; Described emulsifier is dimethylolpropionic acid (DMPA), and described chain extender is ethylenediamine; Described linking agent is pentaerythritol, dipentaerythritol, triethanolamine (TEA) any one or a combination of two or more; the curing agent is isophorone diisocyanate, and the talcum powder is 1000 mesh.

Embodiment 2

[0029] A preparation method for reusable water-based polyurethane masking material, comprising the following steps:

[0030] Step S1. Accurately weigh 22 parts by weight of polytetrahydrofuran ether glycol and 2 parts by weight of plasticizer (dibutyltin dilaurate), place them in a reactor filled with nitrogen, and react under stirring at 75°C for 15 minutes;

[0031] Step S2, add 15 parts by weight of toluene diisocyanate, 3 parts by weight of emulsifier (dimethylolpropionic acid (DMPA)) and 2 parts by weight of curing agent (isophorone diisocyanate) in the reactor, and adjust the temperature of the water bath to 80°C, stir for 30min;

[0032] Step S3, adding 4 parts by weight of polyethylene glycol monomethyl ether, continuing to react for 1 hour, adding 1 part by weight of crosslinking agent (triethanolamine) and chain extender (ethylenediamine) dropwise, adding deionized water to adjust the solid content to 50%, continue to react for 1h, cool down;

[0033] Step S4, addi...

Embodiment 3

[0037] A preparation method for reusable water-based polyurethane masking material, comprising the following steps:

[0038] Step S1. Accurately weigh 15 parts by weight of 3001 polyester polyol and 1 part by weight of plasticizer (dibutyltin dilaurate), place them in a reactor filled with nitrogen, and react under stirring at 90°C for 15 minutes;

[0039] Step S2, add 10 parts by weight of toluene diisocyanate, 3 parts by weight of emulsifier (dimethylolpropionic acid (DMPA)) and 1 part by weight of curing agent (isophorone diisocyanate) in the reactor, and adjust the temperature of the water bath to 90°C, stirring for 40min;

[0040] Step S3, adding 3 parts by weight of polyethylene glycol monomethyl ether, continuing to react for 1 hour, then adding 1 part by weight of crosslinking agent (triethanolamine) and chain extender (ethylenediamine) dropwise, adding deionized water to adjust the solid content to 50%, continue to react for 1.5h, cool down;

[0041] Step S4, adding...

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PUM

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Abstract

The invention relates to a reusable waterborne polyurethane shielding material and a preparation method thereof. The preparation method of the material comprises the steps that: 1, any one or a combination of two or more of polypropylene oxide glycol, polypropylene oxide triol, polytetrahydrofuran ether diol and 3001 polyester polyol, and a plasticizer, are weighed and placed in a reactor filled with nitrogen, stirring the materials at the temperature of 75-95 DEG C and reacting for 15-30 minutes; (2) adding toluene diisocynate, an emulsifier and a curing agent into the reactor, adjusting thewater bath temperature to 80-95 DEG C, and stirring for 30-50 minutes; (3) adding polyethylene glycol monomethyl ether, continuously reacting for 1-2h, dropwise adding a cross-linking agent and a chain extender, adding deionized water to adjust the solid content to 40-60%, continuously reacting for 1-2h, and performing cooling; and (4) adding talcum powder into the raw materials obtained in the step S3, and performing uniform stirring to obtain the waterborne polyurethane shielding material. The material is waterborne polyurethane, can realize good bonding and shielding effects, and has the advantages of high viscosity, reusability, simplicity in operation, no pollution in after-treatment and the like.

Description

technical field [0001] The invention belongs to the field of polyurethane materials, and in particular relates to a reusable water-based polyurethane masking material and a preparation method thereof. Background technique [0002] During the processing of existing auto parts, masking treatment is required for parts that do not need to be sprayed. For example: when spraying a bumper, in order to ensure that the pull-out force of the bumper radar area is qualified and to avoid paint mist attached to the radar pasting area, it is necessary to cover the bumper radar hole area. [0003] At present, the masking method is mainly based on adhesive tape or masking paper (plastic film). However, after the adhesive tape is treated at a high temperature of 80°C on the base material, the adhesive performance of the adhesive decreases, and residual adhesive is easy to remain on the surface of the product, the post-processing is complicated, and the used adhesive tape cannot be reused, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/28C08G18/32C09D175/08C09D175/06C09D5/20C09D5/18C09D7/20C09D7/61
CPCC08G18/6685C08G18/6651C08G18/48C08G18/42C08G18/283C08G18/3228C08G18/3206C09D175/08C09D175/06C09D5/20C09D5/18C09D7/20C09D7/61C08K3/34
Inventor 杜帅潘昱企
Owner 长春一汽富维东阳汽车塑料零部件有限公司
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